From c68f81fec8cb15a5c88c3e0ae152c719e633318c Mon Sep 17 00:00:00 2001 From: Thomas Huth Date: Mon, 4 Mar 2024 11:44:05 +0100 Subject: [PATCH] hw/pci-bridge/cxl_upstream: Fix problem with g_steal_pointer() When setting GLIB_VERSION_MAX_ALLOWED to GLIB_VERSION_2_58 or higher, glib adds type safety checks to the g_steal_pointer() macro. This triggers errors in the build_cdat_table() function which uses the g_steal_pointer() for type-casting from one pointer type to the other (which also looks quite weird since the local pointers have all been declared with g_autofree though they are never freed here). Let's fix it by using a proper typecast instead. For making this possible, we have to remove the QEMU_PACKED attribute from some structs since GCC otherwise complains that the source and destination pointer might have different alignment restrictions. Removing the QEMU_PACKED should be fine here since the structs are already naturally aligned. Anyway, add some QEMU_BUILD_BUG_ON() statements to make sure that we've got the right sizes (without padding in the structs). Signed-off-by: Thomas Huth Reviewed-by: Jonathan Cameron Reviewed-by: Michael Tokarev Signed-off-by: Michael Tokarev --- hw/pci-bridge/cxl_upstream.c | 8 ++++---- include/hw/cxl/cxl_cdat.h | 8 +++++--- 2 files changed, 9 insertions(+), 7 deletions(-) diff --git a/hw/pci-bridge/cxl_upstream.c b/hw/pci-bridge/cxl_upstream.c index e87eb40177..537f9affb8 100644 --- a/hw/pci-bridge/cxl_upstream.c +++ b/hw/pci-bridge/cxl_upstream.c @@ -192,8 +192,8 @@ enum { static int build_cdat_table(CDATSubHeader ***cdat_table, void *priv) { - g_autofree CDATSslbis *sslbis_latency = NULL; - g_autofree CDATSslbis *sslbis_bandwidth = NULL; + CDATSslbis *sslbis_latency; + CDATSslbis *sslbis_bandwidth; CXLUpstreamPort *us = CXL_USP(priv); PCIBus *bus = &PCI_BRIDGE(us)->sec_bus; int devfn, sslbis_size, i; @@ -270,8 +270,8 @@ static int build_cdat_table(CDATSubHeader ***cdat_table, void *priv) *cdat_table = g_new0(CDATSubHeader *, CXL_USP_CDAT_NUM_ENTRIES); /* Header always at start of structure */ - (*cdat_table)[CXL_USP_CDAT_SSLBIS_LAT] = g_steal_pointer(&sslbis_latency); - (*cdat_table)[CXL_USP_CDAT_SSLBIS_BW] = g_steal_pointer(&sslbis_bandwidth); + (*cdat_table)[CXL_USP_CDAT_SSLBIS_LAT] = (CDATSubHeader *)sslbis_latency; + (*cdat_table)[CXL_USP_CDAT_SSLBIS_BW] = (CDATSubHeader *)sslbis_bandwidth; return CXL_USP_CDAT_NUM_ENTRIES; } diff --git a/include/hw/cxl/cxl_cdat.h b/include/hw/cxl/cxl_cdat.h index 8e3d094608..b44cefaad6 100644 --- a/include/hw/cxl/cxl_cdat.h +++ b/include/hw/cxl/cxl_cdat.h @@ -130,7 +130,8 @@ typedef struct CDATSslbisHeader { uint8_t data_type; uint8_t reserved[3]; uint64_t entry_base_unit; -} QEMU_PACKED CDATSslbisHeader; +} CDATSslbisHeader; +QEMU_BUILD_BUG_ON(sizeof(CDATSslbisHeader) != 16); #define CDAT_PORT_ID_USP 0x100 /* Switch Scoped Latency and Bandwidth Entry - CDAT Table 10 */ @@ -139,12 +140,13 @@ typedef struct CDATSslbe { uint16_t port_y_id; uint16_t latency_bandwidth; uint16_t reserved; -} QEMU_PACKED CDATSslbe; +} CDATSslbe; +QEMU_BUILD_BUG_ON(sizeof(CDATSslbe) != 8); typedef struct CDATSslbis { CDATSslbisHeader sslbis_header; CDATSslbe sslbe[]; -} QEMU_PACKED CDATSslbis; +} CDATSslbis; typedef struct CDATEntry { void *base;